Evanescent-wave fluorescence microscopy using symmetric planar waveguides
نویسندگان
چکیده
منابع مشابه
Evanescent-wave fluorescence excitation in aqueous solutions using symmetric planar waveguides
We describe a method of delivering light to biological samples using a planar waveguide structure with a symmetric cladding environment. The symmetry of the waveguiding structure allows the penetration depth of the evanescent field to be tuned over a wide range by varying the thickness and/or refractive index of the waveguide. Furthermore, the symmetrical structure facilitates efficient excitat...
متن کاملReflectionless evanescent-wave amplification by two dielectric planar waveguides.
Utilizing the underlying physics of evanescent-wave amplification by a negative-refractive-index slab, it is shown that evanescent waves with specific spatial frequencies can also be amplified without any reflection simply by two dielectric planar waveguides. The simple configuration allows one to take advantage of the high resolution limit of a high-refractive-index material without contact wi...
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In a previous Letter [Tsang and Psaltis, Opt. Lett.31, 2741 (2006)], we assert that the total reflection coefficient of two dielectric slabs goes to zero in the limit of single-waveguide resonance. A more careful derivation shows that this is not the case. The correct condition in which reflectionless evanescent-wave amplification can be achieved by two dielectric planar waveguides is derived i...
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Forces arising from overlap between the guided waves of parallel, microphotonic waveguides are calculated. Both attractive and repulsive forces, determined by the choice of relative input phase, are found. Using realistic parameters for a silicon-on-insulator material system, we estimate that the forces are large enough to cause observable displacements. Our results illustrate the potential for...
متن کامل1 7 O ct 2 00 6 Reflectionless evanescent - wave amplification by two dielectric planar waveguides
Utilizing the underlying physics of evanescent-wave amplification by a negative-refractive-index slab, it is shown that evanescent waves with specific spatial frequencies can also be amplified without any reflection simply by two dielectric planar waveguides. The simple configuration allows one to take advantage of the high resolution limit of a high-refractive-index material without contact wi...
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ژورنال
عنوان ژورنال: Optics Express
سال: 2009
ISSN: 1094-4087
DOI: 10.1364/oe.17.005075